Spec Sheet

81B
SERIES
MULTIMODE
Features:
 4 Channels Bi-Directional, Form-C
(Normally Open or Normally Closed) Dry
Contact Closure
 Latching Relays reduce power
requirement
 User-Selectable feature maintains
Contact Status through Power-Cycle
and Loss-of-Optical-Power.
 User Control to Reset all Contact Status
 Diagnostics: Power, Optical Presence
and Channel Indicators
 High Density DB26 Data Connector with
Adaptor to screw terminal
Specifications:
Data:
Contact Closure Rating...............0.5A Max.
40 Volt DC or Peak AC Per Channel
Response Time ..................................5 ms
Connector..................... DB26 with Adaptor
to Screw Terminal
Optical:
Wavelength ......................... 1310/1550 nm
Loss Budget (62.5/125µ) .................. 12 dB
Connector..............................................ST
Temperature (Operating)
-40°C to +75°C, non-condensing
Power Supply:
Module – 12 VDC (AFI Part # PS-12+)
Rack Card – AFI SR 20/2
Size:
Module .........................81/8” x 41/8” x 11/8”
Rack Card 6½” x 5” x1”
Product Ordering Information:
MTX = Module Transmitter–Signal Source
MRX = Module Receiver–Signal Receive
RTX = Rack Card Transmitter-Signal Source
RRX = Rack Card Receiver–Signal Receive
Example: MTX-81B to RRX-81B
11/2018 vv
3/23/2012 JPM
4 CHANNEL BI-DIRECTIONAL
CONTACT CLOSURE SYSTEM
The American Fibertek 81B Series multiplexes 8 total channels (4 in each
direction) of dry latching contact closure on one multimode fiber. A user
selectable feature allows the contact status to be maintained unchanged or
reset through power-cycle and loss-of-optical-power. A reset button is
available to clear all contact status to the default state. Individual channel
LEDs on the transmitter and the receiver units indicate the channel status.
These systems require no field adjustments at installation or additional
maintenance thereafter. Diagnostic indicators provide a quick visual indication
of system status.
Equipment may be ordered as stand alone modules or rack cards that are
mounted in the SR-20D/2 or SR-20R/1 AFI Card Cages. The “Afinety”
intelligent remote monitoring system is available on the Rack Card
product, please consult factory.
MTX-81B
or
RTX-81B
MRX-81B
or
RRX-81B
ONE
SINGLEMODE
FIBER
CONTACT
OUTPUTS
Channels 1 to 4
CONTACT
INPUTS
Channels 5 to 8
CONTACT
INPUTS
Channels 1 to 4
CONTACT
OUTPUTS
Channels 5 to 8